Ruling out sighting was 'revelation' in Madeleine case

Evidence gathered to rule out the sighting of a man and child previously thought to be Madeleine McCann and her abductor has been described as a "revelation" by police investigating the three-year-old's disappearance.

Detective Chief Inspector Andy Redwood told BBC's Crimewatch programme why the revision of the 9:15pm sighting in the timeline of the night of May 3 2007 has had such significance on the investigation.